Abstract
Wide wavelength tuning by a variable reflective output coupler is demonstrated in high-power double-cladTm3+-doped silica fiber lasers diode-pumped at∼790 nm. Varying the output coupling from 96% to 5%, the laser wavelength is tuned over a range of 106 nm from 1949 to 2055 nm. The output power exceeds 20 W over 90-nm range and the maximum output power is 32 W at 1949 nm for 51-W launched pump power, corresponding to a slope efficiency of∼70%. Assisted with different fiber lengths, the tuning range is expanded to 240 nm from 1866 to 2107 nm with the output power larger than 10 W.
Highlights
Cladding-pumped Tm3+-doped fiber lasers operating in the eye-safe ∼2 μm spectral region have attracted much attention in recent years, owing to their wide applications in areas such as remote sensing and biomedicine [1]
We report efficient operation of Tm3+doped double-clad silica fiber lasers, pumped by high-power diode lasers at 790 nm, with the maximum output power over 30 W and a slope efficiency of ∼70% with respect to launched pump power
A small portion of Al3+ ions was doped into the fiber to suppress the energy transfer upconversion (ETU) processes, which may cause the quenching of the 3F4 multiplet lifetime
Summary
Cladding-pumped Tm3+-doped fiber lasers operating in the eye-safe ∼2 μm spectral region have attracted much attention in recent years, owing to their wide applications in areas such as remote sensing and biomedicine [1]. Direct pumping of double-clad Tm3+-doped fiber lasers with diode lasers at ∼790 nm has achieved output power up to 85 W [2] and 120 W [3] with slope efficiencies of around 57% with respect to the launched pump power.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
